Is it at all possible to use the 'forcepae -- forcepae' option with Unetbootin? When I try it does not recognize the command.

I wonder if I have to do a netinstall (instead of a full ISO install) to do it. I'm currently trying to install Scientific Linux 6.x (based on Fedora Enterprise) on a machine that supports PAE but does not report it. So installation stops at that point. Any assistance would be appreciated!